:: Product Information

AlgaeTorch Chlorophyll and Cyanobacteria Measurement


The quick-and-easy portable measuring instrument. Switch on, dip in, read off!

The bbe AlgaeTorch is a lightweight instrument for the simultaneous quantification of the chlorophyll-a content of cyanobacteria and the total chlorophyll content of microalgae in water. The measurement of chlorophyll-a can eliminate laborious sample preparation in the lab. A complete measurement needs less than 20 seconds. No sampling or preparation is necessary.

Measurement of algal concentrations via fluorescence

The bbe AlgaeTorch uses in vivo fluorescence of algae cells: the algae pigments are selectively excited by coloured LEDs and emit red fluorescence light as a natural phenomenon at high sensitivity. The intensity of the chlorophyll fluorescence is used to calculate the different algae as chlorophyll-a, here blue-green algae (cyanobacteria) and total microalgae. The calculation is carried out internally using an optimised algorithm. The results are shown immediately on the display and stored in the internal memory. An encapsulated USB port enables subsequent data transfer to a PC. The PC software is supplied free of charge.

Automatic turbidity measurement

The built-in turbidity sensor calculates the results in FTUs (formazine turbidity units). A turbidity measurement is taken with each chlorophyll measurement. The novelty here is the automatic turbidity correction during chlorophyll measurement which makes subsequent correction unnecessary, improves the accuracy and enables the evaluation of the results in the field, at site.

For more on turbidity measurements, please see the Knowledge section.

Innovative operating concept - fast measurement

The instrument is robust and completely sealed. It is operated through the transparent housing using capacity keys. The key actions are confirmed by a vibration signal. In this way it is possible to ensure safe operation of the instrument even in a wet environment. The instrument is deployable down to depth of 10 m (optionally 100 m with the AlgaeTorch 100). No power cable is needed for operation due to the internal rechargeable batteries.

The AlgaeTorch 100 can perform submersed chlorophyll analysis in real time down to maximum 30 m depth. Different lengths of cable extensions (10, 20 and 30 m) are available for profiling and data transfer. The built-in pressure sensor in the AlgaeTorch 100 traces the depth. All results are visualized on the screen with the connected PC using bbe++ software.

Technical specification of our AlgaeTorch


total chlorophyll [μg chl-a/l]

concentration of cyanobacteria [μg chl-a/l]

Measuring range0 - 200 μg chl-a/l
Resolution0.1 μg chl-a/l
Size (H x ?)500 x 60 mm
Power supply110/230 V - 50/60 Hz - 12V DC
Power input10 W
TemperatureSample: 0 - 35° C / Environment: 0 - 40° C
Protection classIP 68

Depth range

AlgaeTorch 10 (10 m)

AlgaeTorch 100 (100 m)

InterfaceUSB data port

carrying case

mains unit



hand loop


10m rope

telescopic rod

nylon shoulder bag

underwater cable extension 10m, 20m, 30m (ATo100)

SDI-12 with bbe converter

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Dianjiang Group Limited
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Tel: (852) 3690 1588   Fax: (852) 3690 1586
Email: Dianjiang_HK@yahoo.com.hk   Hongkong@Dianjiangtech.com
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